Typewriting machine



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/ 'ATTORNEY Watentedl t atentos i i 1r"n'rm1G MMJHlNlI Charles Al. Fuchs, llliollis, N. Y., assigner, by

mcsnc assicnts,

to Burnell Laboratory ompany, Incorporated, lLooust Valley, N. Y., a corporation of llliellaware Application Jann 29, 1935, Serial No. 3,91@

116 Ciaims.

lecting means and the type bar actuator being 'operable by continually running powermeans which may be connected, by means of either of two clutches under the control of the key'levers, to the type bar setting means to actuate the latter and. also effect the actuation of the type bar actuator. Some of the devices, shown herein, are disclosed more fully in my application Serial Number 3,909, filed Jan.. 29, 1935 and in which application they are also claimed.

A feature of the invention relates to the utilization of a single clutch to effect the actuation of the type bar setting means in either direction from its normal position. To this end provision is made for connecting the power means differently through the medium of the clutch.

Other novel features relate to means for rendering the clutch effective, means for retaining the clutch connected until it has completed a cycle, and means to render the clutch ineffective at the completion of a cycle.

Another feature of the invention relates to means including a single cam element which cooperates with the `actuating lever, of the type bar setting means, to'drive it in opposite directions from its normal position.

Another feature of the invention relates to means to bring the actuating lever and the connected type bar carrier to rest with the selected type bar registering with theprinting point prior to the printing operation of the type bar. This means-includes a cam element which operates the actuating lever connected to the type carrier. Another feature relates to means to prevent accidental displacement of the cam element and its associated parts from normal position.

Another feature of the invention relates to means whereby the type bar actuator may be operatedby the clutch through the medium of the element which operates the actuating lever 55 Another feature of the invention relates to irrespective of the direction of motion of said (ICB. 1197-16) novel means for setting suitable fulcrum pins for the lever which actuates the type carrier.

Another feature relates to resilient means which tends to hold the actuating lever in its normal position against accidental pivotal movement to keep the apertures Vtherein in alignment with the fulcrum pins.

Another feature relates to power driven means' to actuate the ribbon vibrator.

A further feature relates to means under the control of the case shifting means to prevent the vibration of the ribbon `while the case shifting means is in its operated position.

Still another feature relates to power driven means to actuate the carriage feeding means.

Other features and advantages will hereinafter appear.

In the drawings which form part of the specification:

Fig. 1 is a staggered, vertical, sectional side view of the machine;

Fig. 2 is a sectional, top plan view of the machine taken on the line 2-2 of Fig. l;

Fig. 3 is a top plan View of the machine, the typewriter and the pin setting means being removed therefrom;

Fig. 4 is a sectional, fragmentary, front view taken on the line 6 4 of Fig. 1;

Fig. 5 is a sectional, fragmentary, front view taken on the line 5-5 of Fig. 1;

Fig. 6 is a side view of the frame by which the pin setting bars are guided;

Fig. 7 is a skeleton top plan view showing the type rack actuating lever operated, about one of its fulcrums, and to one side from its normal position; Y

Fig. 8 is a View similar to Fig. '7 showing the actuating lever operated, about another one of its fulcrums, and to the opposite side of its normal position;

Fig; 9 is a skeleton, side view showing the type bar actuator in its operated position;

Fig. 10 is a detail front view, partly in section, showing the rock shafts, of the pin setting mechanism, and the key lever operated devices associated with them, one of the rock shafts and its corresponding key lever being shown in their operated positions;

Fig. 11 is an enlarged,` fragmentary, sectional side view showing the means operable by the key levers for effecting a connection with the powermeans of the cam which operates the lever whereby the type rack is operated;

Fig. 12 is a top plan view of the clutch;

Fig. 13 is a sectional front View of the clutch leased and operated to effect a connection of onel taken approximately on the line iS-I of Fig. 14;

Fig. 14 is a sectional side view of the clutch taken on the line I4-I4 of Fig. 4;

Fig. 15 is a vertical section of the clutch taken on the line |5-i5 of Fig. 4;

Fig. 16 is a vertical section of the clutch taken on the line IG--IB of Fig. 4 and shows the rock shaft. which carries the lever operating cam, actuated in a counter-clockwise direction from its normal position; y

Fig. 17 is a view similar to Fig. 16 showing the rock shaft actuated in a clockwise direction from its normal position; y

Fig. 18 is a. view similar to Fig..1'7 but shows the clutch parts in a position to be coupled prior to the actuation of the rock shaft to the position in Figll; i

Fig. 19 is a detail sectional view showing the structure including two springs which tend to hold the drive shaft for the type carrier in its normal position; d

Fig. 20 is a sectional view taken on the line 20-20 of Fig. 19;

Fig. 21 is a sectional view taken on the line 2|-2i of Fig. 19; l

Fig. 22 is a sectional view taken on the line 22-22 of Fig. 19;

Fig. 23 is a developed plan view of the clutch showing some of the parts in the same position as in Figs. 1, 11 and 14 and showing a slide refrom engagement with the connectinglevice between the two clutch elements, to permit said device to be restored to normal and thus disconnect the reciprocating clutch element from the cooperative clutch element;

Fig. 26 is a view similar to Fig. 23 but shows the slide actuated at aninstant when all of the connecting devices are out of alignment with their corresponding slots in the cooperative clutch elements; l

Fig. 27 is a view similar to Fig. 28 and shows the pawl actuating slide pushed back slightly by one of the connecting pawls but not far enough to catch behind the releasing pawl at the left hand end of the slide;

Fig. 28 is a view similar to Fig. 27 and show the connecting pawl after it has been registered with its. corresponding slot and moved into said slot by the slide; -V

Fig. 29 is a view similarto Fig. 28 and shows the clutch operated through half a cycle, the connected reciprocating clutch element being in a position extremely opposite to that shown in Fig. 28;

Fig. 30 is a fragmentary, front view, partly in section, showing the cam which actuates the section taken on the line taken on the line 32-32 of Fig. 1 and shows the ribbon vibrating mechanismand the means under the control of the case shift mechanism which prevents the vibration of the ribbon under tuated by the power means.

Similar reference characters represent similar parts throughout the drawings.

General description A brief Mdescription will be given followed by a more detailed one of the construction and operation of the machine which includes a type unitA 40, Fig. 1, having two groups of short or midget type bars 4i arranged in two sets at opposite sides of the printing point. The type unit 40 is attached to a shaft 42 which may be rotated in opposite directions from a normal position t accordingly rotate the type carrier and thus locate any one of the type bars of either group at the printing point. A type bar actuator 43, which is substantially in alignment with the printing point, is also operable to actuate the selected type bar against a. platen 44 to print through a ribbon 45 and against a work sheet, not shown, on said platen, each type bar being provided with a lower case type 46 and an upper case type 4l.

A continually running power means includes a motor 50, at the rear of the machine, which vdrives a shaft I to which is connected a driving device 52, Figs. 1 and 2. Said driving device may be connected to operate a cam element 5 3 in either one of two directions from a normal position. The cam element engages the forward end of a fulcrum bar or lever 54 connected-to rotate the shaft 42, the fulcrum bar 54 receiving always the same extent of motion from the cam element 5I; irrespective of the direction of movement of the latter.- ,The lever 54 is operable about any -one of a set of lfulcrum pins 58' which are selectively settable intocooperation therewith, in a manner hereinafter described, by the depression of any one of the key levers 51.

The key levers l1 are also divided into two groups, a group A including all of the key levers to the left of the middle of the machine and a group B including all of the key levers to the `right of the middle of the machine, said key tive the power means to drive the type carrier f in one direction or the other, from its normal position, to register. the selected type bar at the4 printing point. Two universal bars SI and 62, Figs. .1, 2 and 4, are provided, the bar 6| being operable by the key levers 61 of the group A and the bar 62 being operable by the other set B of key levers. These universal bars are operable by any one of the associated group of key levers to actuate suitable mechanism, hereinafter described, to actuate the clutch differently to con-f atentos including the fulcrum bar 99, from the continually running power means.

A more detailed description of the construction and operation Yof the machine will'now be given. ,a

Frame The machine includes a main frame having two side plates 95, a front plate tt, a rear plate t1 and i a base plate 69, the latter being suitably secured to the side plates 05.

Carriage The-platen M is supported by a shaft 'l0 mounted to rotate in end plates 1i of a carriage 12, said end plates 1i being connected to each other by guide bars '13 and 19. The work sheet,

' not shown, may be inserted aroundl the platen from the rear thereof over a paper table 15 having an apron 1t to guide the work sheet to the printing line at the front of the platen. Feed rollers 11 and 18 may be supported on' the carriage in any well known manner to assist in feeding the work sheet around 'the platen.

Platen shifting means A platen shift frame 90, Figs. 1, 32 and 33, includes a rail l upon which the carriage 12 is supported, to travel back and forth transversely of the machine, through the medium of antifriction balls or rollers 92 under the bar 13 of the carriage, said carriage being urged in a letter space direction by suitable propelling means, not shown. l Arms 8i extend downwardly from the rail 8l, one at each end thereof, and each is pivotally connected, at 85, to a bell crank 86, both bell cranks 86 being secured to a rock shaft 81, supported in the side plates 65 of the main frame. The, bell cranks 86 uand the rock shaft 8| form a frame which may be actuated, by means of key actuated links 80, to shift the platen down for printing with the upper case types 41. Areturn spring 88a connected to one of the bell cranks 8S returns the ten to its lower case position. Guide links 9 are connected at their forward ends by pivot studs 90 to the lower ends of the arms 84, the rear ends of the guide links 89 being pivoted on the side plates 95 of the main frame by studs 9|.

Secured to the rail 8|, near the middle therej There are forty-two key levers 51, Figs. 1, 2 and 4, one for each type bar 4|. These key levers are provided at their forward ends with character keys 96 arranged in four banks in the key board.` All of the key levers are supported at4 their rear ends by a fulcrum rod 91, supported in a wide, upward extension 98 of a bar 99 positioned transversely of the machine and secured at each end to a post |00 by a screw I0 I, the posts |00 projecting upwardly from the bottom plate 68. Each key lever is operable against the action of a return spring |02, connected at its lower end to the key lever, the upper end of each spring |02 being connected to an angle plate |03 supported on a front plate |04 of a frame |05, the latter including also two side plates |06 secured to the cross bar 99, said frame being supported at its forward end upon the bar 99 by feet |06. The key levers are guided in slots |01, of the the groups of type bars, the key levers of the y groups A and B being effective to actuate the universal bars tl and t2 respectively. The universal bar tl is supported on two arms llt, Figs. 2 and i, which are secured to a rock shaft iii, the latter being supported in ears i12 of a bracket M3 secured to the bar 99. A spring l Hi is coiled around the shaft lill, at the lefthand end thereof, to return the universal .bar ti to normal. The universal bar 92 is supported in a similar manner by arms lll@X secured to a rock shaft llix which is supported in ears H2X of a bracket M3 secured to the bar 99, a return spring imx being provided for said universal bar. The mechanism operable by the universal bars 9i and 92 to connect the power means with the type bar carrier lill will be described later.

Type carrier The type carrier t9 is like that shown in my above mentioned copending application, and includes a circular fulcrum plate lit upon the outer edge of which the type bars 4l are pivoted. The type bars are guided in radial slots lil and llt o-f circular guide plates |19 and i20 respectively secured to a body part 12H and each type bar is operable against the action of a return spring In the present, form of the invention the type bar carrier 90 isdemountably attached to a reduced portion |123 of the drive shaft 42, the body part |21 having an aperture |24 into which the shaft portion |23 extends. A latch, not shown, holds the type bar carrier against a coupling eleforms a driving connection between -the shaft 86V and the type carrier. vThe latch may be acmated by a push button ze to render it ineffective and thus permit its removal from the drive shaft.

Actuatzng mechanism for type bar carrier The mechanism for actuating the type bar4 carrier 40 includes the drive shaft 42, Fig. l, the upper end of which is rotatably supported in a boss |30 on the bracket |3| secured to a cross bar |32 supported at its end by the side plates 65 of the `machine frame. The lower end of the shaft 42 extends through a slot |33 of the rear plate 61 and is guided by a ball bearing |34 of a bracket |35 secured to the rear plate 61 by one or morebolts |36.

To the lower end of the drive shaft 42 is secured a pinion |31 engaged by a gear sector or rack |38, Figs. 1 and 3, having an arm |39 provided with a hub |39a by which it is pivotally supported to swing about a stud |40, secured to the base plate 68, to rotate the shaft 42 through the medium of the rack |38 and pinion |31, said arm bearing on a flange I4| of said stud and being held on said stud by a screw |42. The rear end of the arm |39 is supported and guided by a tongue like plate |43, Figs. 1 and 2, rigidly mounted on posts |44 of the base plate 60 and engaging in a slot |45 extending from side to side in the rear edge of the arm |39. The rack carrying arm |39 is actuatable by the fulcrum bar or lever 54 in a manner now to be described.

The forward end of the fulcrum bar or lever A 

